Stulz CyberRow CRS-090-C, Engineering Manual, Page: 16 / 20

rotating parts. Each high voltage circuit shall be individually
protected by circuit breakers or manual motor starters on
all three phases. The blower motor shall have thermal and
short circuit protection. Line voltage and 24 volt control
circuit wiring shall be routed in separate bundles. The
electric box shall include all the contactors, starters, fuses,
circuit breakers and terminal boards required for operation
of the CyberRow® unit and shall allow for full service via
front and rear access panel.
AUTOMATIC DUAL POWER TRANSFER
SWITCH (OPTIONAL)
Two individual main power input disconnect switches shall
be provided, one for each incoming power source. In the
event the primary power fails or a phase loss/imbalance
occurs, the automatic transfer switch transfers power to the
secondary power source. Once the primary power has been
restored, the transfer switch automatically shifts the power
load back to the primary power. The transfer time from one
source to the other is user adjustable to allow staging or
sequence restart of load.
In addition to the automatic transfer switch function, the
local controller display shall indicate which power source
has failed. This indication is a visual depiction that allows
the user to determine the status of the input source.
This status can also be conveyed thru the BMS serial
communication link.
REMOTE STOP/START CONTACTS
Included in the system’s electrical control circuit shall be
a 2-pin terminal connection for remote stop/start of the
CyberRow® air conditioner by remote source.
MAIN POWER SERVICE SWITCH
The CyberRow unit shall be provided with a unit mounted
main power service switch.
16
E²
SERIES CONTROLLER DESCRIPTION
GENERAL
The advanced microprocessor based
E²
Series controller
shall be equipped with fl exible software capable of meeting
the specifi c needs of the application. The setpoints shall
be default and their ranges shall be easily viewed and
adjusted from the user interface display. The program and
operating parameters shall be permanently stored on a
non-volatile system in the event of power failure.
The controller shall be designed to manage temperature
and relative humidity (RH) levels to a user defi ned setpoint
via control output signals to the CyberRow® unit. Control
parameters have variable outputs from 0 to 100% of the
full rated capacity.
The controller shall receive inputs for measurable control
conditions (temperature, relative humidity, and dew point)
via return air or room mounted sensors. The internal logic
will then determine if the conditions require cooling,
humidifi cation or dehumidifi cation. Control setpoints
shall be established to maintain design conditions of
the installation. The controller will respond accordingly
to changes in these conditions and control the output/
demand for the appropriate mode of operation until user
defi ned conditions are achieved.
FIELD CONFIGURABLE
The program for the
E²
Series controller shall be fi eld
confi gurable, allowing the operator the capability of
selecting control setpoints specifi c to the application.
Operator interface for the
E²
controller is provided
via a door mounted user interface display panel. The
display panel shall have a backlit LCD graphical display
and function keys giving the user complete control and
monitoring capability of the precision cooling system. The
menu driven interface shall provide users the ability to
scroll through and enter various menu screens.
PASSWORD PROTECTION
Access to the Info Menu, Alarms Log, and the ability to
monitor room conditions shall be allowed without the
use of a password. Modifi cations to the control setpoints
shall require the use of a password. The controller shall be
programmed to recognize predetermined security levels
before allowing access to display screens containing critical
variables. Three secured menu levels (Control, Service
and Factory) will support unique passwords that must be
PRODUCT GUIDE SPECIFICA
TIONS
CyberRow®